No. HydroCarbon is the theme I have made by slightly modifying the original Carbon theme. Here is the list of changes:

1. Shuffle/Loop icons in the Media Player have been fixed to light up in their active state.
2. All notifications are now yellow, not gray. They are supposed to be easily noticeable.
3. The list item dividers are made recessed.
4. The active list item no longer has edges between columns in multi-column lists (see address book, call log).
5. The progress bars are light blue (thanks go to Andrew Zhilin for this one). As a result, you can now read text shown on top of those progress bars.

I still have not fixed the menu borders: cannot find where they are in the template. Going to make a few more modifications as well.